<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>权重练习</title>
    <style>
        .nav li {
            color: red;
        }
        .pink {
            color: pink;
            font-size: 700;
        }
    </style>
</head>
<body>
    <ul class="nav">
        <li class="pink">22222</li>
        <li>111122</li>
        <li>111122</li>
        <li>111122</li>
    </ul>
</body>
</html>